Key Findings
Leading solar manufacturer LONGi has announced a ¥240 million (approximately $33.8 million) investment for the construction of a 100 MW pilot production line dedicated to high-efficiency crystalline silicon-perovskite tandem solar cells in Xixian New Area, Shaanxi province. This strategic move follows LONGi’s recent breakthroughs in power conversion efficiency, achieving 35.2% in May and an impressive 35.5% in July 2026. The pilot line is positioned as a critical step to transition laboratory world records into pilot-scale verification for commercialization, drawing significant industry attention as a benchmark for perovskite tandem technology mass production.
Technical Details
LONGi’s crystalline silicon-perovskite tandem solar cells are designed to utilize the solar spectrum more efficiently by stacking two different bandgap photovoltaic materials, thus breaking through the efficiency limits of conventional single-junction silicon solar cells. The company’s technological advancements are particularly notable in interfacial passivation and optical management layers, which reduce charge recombination losses between the perovskite and silicon layers, leading to high conversion efficiencies. The 35.5% record has been certified by the European Solar Test Installation (ESTI), with strong performance also reported for practical device sizes (e.g., 32.2% for 274 cm²). This technology is theoretically capable of reaching 43% efficiency, promising further evolutionary improvements.
Background & Context
The global solar photovoltaic market constantly demands higher efficiency and lower costs. Perovskite tandem solar cells are widely regarded as the most promising next-generation technology due to their high theoretical efficiency and potential for low-cost manufacturing. Investments by major players like LONGi in pilot production lines signify that this technology is moving beyond pure research into a phase of practical implementation and mass production. China leads the world in solar PV research, development, and manufacturing, and LONGi’s investment further solidifies this competitive advantage. The success of this pilot line is expected to have significant ripple effects, accelerating the adoption of perovskite tandem technology across the industry.
Strategic Significance & Outlook
The construction of a 100 MW pilot line is an essential step for LONGi, not only for technical validation but also for optimizing manufacturing processes, evaluating cost structures, and conducting long-term reliability assessments for commercial production. A successful pilot will establish LONGi as a market leader in perovskite tandem solar cells, potentially paving the way for future gigawatt-scale mass production. This, in turn, is expected to further reduce the levelized cost of solar electricity, accelerating the energy transition away from fossil fuels. Investors and energy companies are keenly interested in the data and progress from this pilot line, as its outcomes will be a critical determinant of the future direction of the next-generation solar cell market.
Source: https://www.energytrend.com/news/20260812-51921.html
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